Microsoft, among many other enterprise-y things, launched GitHub discussions, which to my amazement does not suck.
95% of popular ML projects are on GitHub and most of them currently have 3 types of issues:
(0) Semi-automated or structured team communication (1) Questions / ideas / collaboration by the community (2) If authors have not invested enough time in proper usability and docs - sometimes you have to read / search all of the issues manually
Given enough development and effort by the community, probably this thing can solve (2) and tap into the crowd knowledge that gets lost with time.
Apparently it also looks like a stab at things like discourse, but free and integrated with your repo and you code. But discourse is probably used by 1% of projects. Too often you see a nice project with a mess or tumbleweeds in the issues tab.
One final question of course - when will Microsoft use it as a means of censorship as all large American companies inevitably do.